Abstract We propose an experimentally feasible scheme for preparing a four-atom cluster state in a thermal cavity. In the scheme, the cavity field is only virtually excited and the photon-number-dependent part in the effective Hamiltonian is cancelled so that the system is insensitive to the cavity decay and the thermal field. At the same time, the scheme can be generalized to prepare n-atom cluster states with the success probability 100%. In addition, using the four-atom cluster state, we also propose a simpler scheme for implementing a remote--controlled not gate (CNOT) without the Bell states measurement.
Received: 04 October 2005
Revised: 18 January 2006
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation (Grant No 10574022), and the Funds of the Natural Science of Fujian Province, China (Grant No Z0512006).
Cite this article:
Yang Rong-Can(杨榕灿), Li Hong-Cai(李洪才), Chen Mei-Xiang(陈美香), and Lin Xiu(林秀) Generation of four-atom cluster states in thermal cavity and implementing remote controlled not gate 2006 Chinese Physics 15 2315
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